Slide fastener



June 27, 1933. G. JOHNSON 1,915,536

SLIDE FASTENER Filed Dec. 8, 1931 Patented June 27, 1933 UNITED STATESPATENT OFFICE GUSTAV JOHNSON, OF WEST ROXIBUBY, MASSACHUSETTS, ASSIGNORTO UNITED-CARR FASTENER CORPORATION, CAMBRIDGE, MASSACHUSETTS, ACORPORATION 01' MASSACHUSETTS SLIDE FASTENER Application filed December8, 1931. Serial No. 579,695.

My invention aims to provide improvements in sliders for multipleoperated fastener installations.

In the drawing which illustrates preferred embodiments of my inventionFigure 1 is a plan view ofa portion of a multiple operated fastenerinstallation showing my improved slider;

Fig. 2 is a section taken on the line 2-2 of Figure 1 showing the sllder1n locked position;

' Fig. 3 is a section similar to that shown 1n Fig. 2, but showing theslider 1n unlocked position;

Fig.4 is a section taken on the l ne 4-4 of Figure 1 to show theconstruction of the pivot bar and the locking means; and

Fig. 5 is a side elevation of my lmproved slider member formed fromsheet metal and with a portion thereof broken away to show theconstruction.

Referring to the drawing which illustrates my invention, I have shownimproved sllden constructions for use in connection wlth multipleoperated fastening installations. In Figs. 1 through 4 I have shown thesllder as being cast from a single piece of metal and in Fig. 5 I haveshown the sllder as it may be formed from a single piece of sheet metal.

My invention relates more particular to the construction of the bar onthe slider to which the pull tab is hinged and also to the means forlocking the slider in any desired osition along the opposed -ser1es offastening elements. Therefore, I shall not attempt further todistinguish between the cast metal slider and the sheet metal slidersince both have similar elements for accomplishlng the desired results.

Myimproved slider members each have a top plate portion 1, a bottomplate portion 2 and means 3 located between the plate portions adjacentto one end to space the plate portions apart, to connect them togethern, predetermined relation, and to provide in effect diverging channelsfor efiectmg engagement and disengagement of the fastening elements 4secured to the opposed edges of the stringers 5. Each of the platemembers 1 and 2 (Fig. 4) has side flanges 6 extending toward the sideflanges of the other part but being spaced from each other in the usualmanner to pass over the stringers while holding the slider in assembledrelation as it is moved to and fro along the fastening elements 4. Inorder to facilitate sliding movement of the slider, I have provided apull tab 7 which, instead of being attached preferably formed bypressing a part of the material of the top plate outwardly and thensuitably forming the material to provide a rounded portion incross-section, as clearly illustrated in Figs. 2 and 3. After the bar 8has been formed apertures 9 and 10 are provided in the plate portion 1ateach side of the bar. One .end of the. pull tab is provided with aloop portion 11 which encompasses the curved portion of the bar 8,thereby attaching the pull tab 7 to the slider in pivoted relationthereto.

In many multiple operated fastener installations it is desirable toprovide means whereby the slider may be located in any desired positionalong the fastener elements. I have provided a simple and efficientlocking means by pressing from the loop portion 11 a projection 12 whichis adapted to engage the fastening members 4 either frictionall orbetween two of them when the pull ta is moved to a predeterminedposition such, for instance, as shown in Fig. 2.

I have found that there are at least two distinct advantages in pivotingthe pull tab member 7 substantially centrally of the top plate. In thefirst place, the slider may be moved easily in either direction byholding the tab at substantially a right angle to the slider. In thesecond place, the projection 12 will enter through the aperture 10 inthe top plate 1 and engage the fastening elements 4 at a point wherethey are being separated from each other, thereby permitting theprojection 12 actually to engage between the fastening elements ratherthan to press against them. With this arrangement any lateral stressesexerted upon the stringers U tending to separate the fasteners willexert an u ward stress against the rojection 12, there y tending to holdthe pull tab in locked position, as shown in Fig. 2.

The operation of my device is simple and locking is more or lessautomatic since in order to move the slider along the fastening elementsthe pull tab must be moved from a position shown in Fig. 2 to a positionshown in Fi 3, or a more right angled position if desira le, therebymovin the projection 12 from the ath of the astenin elements. When the sider is moved to the esiredposition it is merely necessary to press thepull tab 7 back into the position shown in Fig. 2 and that action swingsthe projection 12 through the aperture 10 in the plate 1 into engagementwith the fastener members 4, as shown in Figs. 1 and 4.

My invention is simple and durable in construction and is reduced to aminimum number of parts the construction and assembl of which isrelatively inexpensive.

V'hile I haveillustrated and described referred embodiments of myinvention do not wish to be limited thereby, because the sec of myinvention is best defined by the fol owing claims.

I claim: 1. A slider for multiple operated fastener installations havina top portion and a bottom portion spac apart to permit the passage ofopposed series of fastener elements, means located between said portionsfor guiding the fastener elements of one series into interlockinengagement with the -o posed series and %or disengaging them as esired,an integral bar" formed from one of said portions, t e longitudinal axisof said bar extending transverselyacross the portion from which it isformed, a slide-operating tab having a loop portion surrounding thesaidbar thereby to constitute with said bara hin e for said tab, saidportion from which said integral bar is formed having an aperturetherein adjacent to said bar and a projection tending transverselyacross the portion from which it is formed, a slide-o erating tab havinga loop portion surroun in the said bar thereby to constitute with saibar a hinge for said tab and a projection extending from said loopportion for engagement with the fastener elements in one position of thetab thereby to lock the slider in a given position with relation to thefastener members, and said portion having said bar also having anaperture adjacent to said bar to permit said rejection to be enteredinto and removed rom the space between said front and back portions bpivotal movement of said tab.

3. A sli e fastener device of the class described having a top plateportion 1, a bottom plate portion 2, means 3 spacing said top and bottomplate ortions from each other to permit passage 0 o posed series offas-v tener elements through t e. device, a hinge bar 8 integral withthe to plate portion 1 and having its longitu'dinaFaxis extendingtransversely across the top, plate portion 1 about midway between theends of the device, a pull ta member 7 having a loop rtion 11encompassing said bar 8 to provi e for pivotal movement of the tab 7relative to the plate ortion 1, an aperture 10 formed in the top p ateportion 1 adjacent to said bar 8 and an integral projection 12 formed insaid loop portion 11 and adapted to pass through the aperture 10 andintersect the passage between said plate portions 1 and 2 as and for thepurposes illustrated and described.

In testimony whereof, I have signed my name tothis specification.

GUSTAV JOHNSON.

extending from said loop portion-through the I said a erture forengagement with the fastener e ements in one position of the tab therebyto lock the slider in a given position with relation to the fastenermembers.

2. A slider for multiple operated fastener installations having a topportion and a bottom portion spaced apart to permit the passage ofopposed series of fastener elements, means located between said portionsfor iding the fastener elements of one series into interlocking enagement with the opposed series and for isengaging them as desired, anintegral bar formed from one of said portions, the ongitudinal axis ofsaid bar ex-

